WO2023136483A1

WO2023136483A1 - Light path control member and display device comprising same

Info

Publication number: WO2023136483A1
Application number: PCT/KR2022/020340
Authority: WO
Inventors: 최원석; 박진경
Original assignee: 엘지이노텍 주식회사
Priority date: 2022-01-17
Filing date: 2022-12-14
Publication date: 2023-07-20
Also published as: KR20230111089A

Abstract

A light path control member according to an embodiment comprises: a first substrate; a first electrode which is disposed on the first substrate; a second substrate which is disposed on the first substrate; a second electrode which is disposed under the second substrate; a light-converting part which is disposed between the first electrode and the second electrode and includes a plurality of accommodation portions having a light-converting material accommodated therein; and a sealing part which seals the light-converting material, wherein the sealing part comprises: a first sealing portion and a second sealing portion which are formed in a cutting area formed by cutting the second substrate, the second electrode, and the light-converting part, and are arranged to extend in a first direction; and a third sealing portion and a fourth sealing portion which are formed in a cutting area formed by cutting the second substrate, the second electrode, and the light-converting part, and are arranged to extend in a second direction different from the first direction, at least one of the third sealing portion and the fourth sealing portion having a different thickness from the thickness of the first sealing portion and the second sealing portion.

Description

Light path control member and display device including the same

Embodiments relate to a light path control member and a display device including the same.

The light blocking film is a film that blocks transmission of light from a light source. The light blocking film is attached to the front surface of a display panel, which is a display device used for a mobile phone, a laptop computer, a tablet PC, a vehicle navigation device, or a vehicle touch screen. The light blocking film adjusts a viewing angle of light according to an incident angle of light when the display transmits a screen. As a result, the user can view clear image quality at a desired viewing angle.

In addition, light-shielding films are used for windows of vehicles or buildings. In detail, the light blocking film may partially block external light to prevent glare. Alternatively, the light blocking film may not be visible from the outside.

That is, the light blocking film controls the movement path of light. Accordingly, the light blocking film can block light at an angle within a set range and transmit light within a set range. Accordingly, the transmission angle of light is controlled by the light blocking film.

The light blocking film may be divided into a light blocking film capable of always controlling the viewing angle regardless of the surrounding environment and a switchable light blocking film capable of turning on/off the viewing angle control by the user according to the surrounding environment.

The switchable light blocking film includes a light conversion unit including an accommodating unit. A light conversion material including particles and a dispersion solution dispersing the particles is filled in the accommodating part. The particles may move by application of a voltage. The accommodation part may be converted into a light transmission part and a light blocking part by the dispersion and aggregation of the particles.

An electrode of the light path control member and an external power source are connected to apply a voltage to the light path control member. An area where the electrode of the light path control member is disposed may be defined as a bezel area in a display device.

Meanwhile, the light path control member may include a cutting area. The cutting area may be formed by cutting one surface of the light path control member. A sealing material may be filled in the cutting area. Thereby, the sealing part is formed. The sealing part may seal the light conversion material.

However, the sealing portion may be de-filmed while the optical path control member is driven. Accordingly, external impurities may be introduced through the cutting region. Accordingly, reliability of the light path control member may be reduced.

Accordingly, a light path control member having a new structure capable of solving the above problems is required.

Embodiments are intended to provide an optical path control member having improved reliability.

An optical path control member according to an embodiment includes a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; a light conversion unit including a plurality of accommodating units disposed between the first electrode and the second electrode and accommodating a light conversion material; and a sealing portion sealing the light conversion material, wherein the sealing portion is formed in a cutting area formed by cutting the second substrate, the second electrode, and the light conversion portion, and extends in a first direction. 1 sealing part and 2nd sealing part; and a third sealing portion and a fourth sealing portion formed in a cutting area formed by cutting the second substrate, the second electrode, and the light conversion portion, and extending in a second direction different from the first direction. , The thickness of at least one of the third sealing part and the fourth sealing part is different from the thickness of the first sealing part and the second sealing part.

In the light path control member according to the embodiment, at least one sealing part of the first sealing part, the second sealing part, the third sealing part, and the fourth sealing part may be disposed inside the cutting area penetrating the light path control member. .

Accordingly, the contact area of the sealing parts may be increased. Accordingly, it is possible to prevent the sealing parts from being delaminated inside the cutting area.

Also, the thickness of the sealing parts may increase. Accordingly, it is possible to prevent moisture from entering the outer surface of the light path control member.

In addition, the outer surface of the cutting area can be easily cut without separate cutting equipment. Accordingly, the area of the side bezel of the light path control member may be reduced.

Therefore, the light path control member according to the embodiment can prevent the sealing part from being filmed off, thereby improving the reliability of the light path control member, and improving the driving characteristics of the light path control member by preventing moisture penetrating into the inside. and the size of the light path control member can be reduced by reducing the size of the side bezel.

1 is a perspective view of a light path control member according to an embodiment.

2 is a top view of a first substrate of a light path control member according to an embodiment.

3 is a top view of two substrates of a light path control member according to an embodiment.

4 is a top view of a second substrate in which a first substrate and a second substrate of the light path control member according to the embodiment are laminated;

5 and 6 are cross-sectional views taken along the line AA′ of FIG. 1 .

FIG. 7 is a cross-sectional view taken along the line BB′ of FIGS. 1 and 4 .

FIG. 8 is a cross-sectional view taken along the line A-A' of FIGS. 1 and 4 .

FIG. 9 is another cross-sectional view taken along the line BB′ of FIG. 1 .

10 and 11 are cross-sectional views of a display device to which a light path control member according to an exemplary embodiment is applied.

12 to 14 are views for explaining one embodiment of a display device to which a light path control member according to an embodiment is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and if it is within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively selected. can be used by combining and substituting.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly specifically defined and described, can be generally understood by those of ordinary skill in the art to which the present invention belongs. It can be interpreted as meaning, and commonly used terms, such as terms defined in a dictionary, can be interpreted in consideration of contextual meanings of related technologies.

Also, terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when described as “at least one (or more than one) of A and (and) B and C”, the combination of A, B, and C is possible. Can include one or more of all possible combinations.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the term is not limited to the nature, order, or order of the corresponding component.

And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected to, combined with, or connected to the other component, but also with the component. It may also include the case of being 'connected', 'combined', or 'connected' due to another component between the other components.

In addition, when it is described as being formed or disposed on the "top (above) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is not only a case where two components are in direct contact with each other, but also one A case in which another component above is formed or disposed between two components is also included.

In addition, when expressed as “up (up) or down (down)”, it may include the meaning of not only the upward direction but also the downward direction based on one component.

Hereinafter, a light path control member according to an embodiment will be described with reference to the drawings. The light path control member to be described below may be a switchable light blocking film that is driven in an open mode and a light blocking mode according to the application of power.

Referring to FIG. 1 , the light path control member 1000 according to the embodiment includes a first substrate 110, a second substrate 120, a first electrode 210, a second electrode 220 and a light conversion unit ( 300) may be included.

The first substrate 110 may support the first electrode 210 . The first substrate 110 may be rigid or flexible.

Also, the first substrate 110 may be transparent. For example, the first substrate 110 may include a transparent substrate capable of transmitting light.

The first substrate 110 may include glass, plastic, or a flexible polymer film. For example, soft polymer films include polyethylene terephthalate (PET), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), and polymethylmethacrylic acid. Polymethyl Methacrylate (PMMA), Polyethylene Naphthalate (PEN), Polyether Sulfone (PES), Cyclic Olefin Copolymer (COC), TAC (Triacetylcellulose) film, Polyvinyl Alcohol ( It may be made of any one of a polyvinyl alcohol (PVA) film, a polyimide (PI) film, and a polystyrene (PS) film, which is only an example and is not necessarily limited thereto.

In addition, the first substrate 110 may be a flexible substrate having flexible characteristics.

Also, the first substrate 110 may be a curved or bent substrate. That is, the light path control member including the first substrate 110 may also be formed to have a flexible, curved or bended characteristic. For this reason, the light path control member according to the embodiment may be changed into various designs.

The first substrate 110 may extend in a first direction (1D), a second direction (2D), and a third direction (3D).

In detail, the first direction (1D) and the second direction (2D) may correspond to the length or width direction of the light path control member. Also, the first direction (1D) and the second direction (2D) may be different directions. Also, the third direction 3D may correspond to a thickness direction of the light path control member.

Hereinafter, for convenience of explanation, the first direction 1D is defined as the longitudinal direction of the first substrate 110 . In addition, the second direction 2D is defined as the width direction of the first substrate 110 . In addition, the third direction 3D is defined as the thickness direction of the first substrate 110 .

The first substrate 110 may have a thickness within a set range. For example, the first substrate 110 may have a thickness of 25 μm to 150 μm.

The first electrode 210 may be disposed on one surface of the first substrate 110 . In detail, the first electrode 210 may be disposed on the upper surface of the first substrate 110 . That is, the first electrode 210 may be disposed between the first substrate 110 and the second substrate 120 .

The first electrode 210 may include a transparent conductive material. For example, the first electrode 210 may include a conductive material having a light transmittance of about 80% or more. For example, the first electrode 210 may include indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, A metal oxide such as titanium oxide may be included.

The first electrode 210 may have a thickness of about 10 nm to about 300 nm.

Alternatively, the first electrode 210 may include various metals to realize low resistance. For example, the first electrode 210 may include chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), or molybdenum (Mo). It may include at least one metal selected from gold (Au), titanium (Ti), and alloys thereof.

The first electrode 210 may be disposed on the entire surface of one surface of the first substrate 110 . In detail, the first electrode 210 may be disposed as a surface electrode on one surface of the first substrate 110 . However, the embodiment is not limited thereto, and the first electrode 210 may be formed of a plurality of patterned electrodes having a certain pattern such as a mesh or stripe shape.

For example, the first electrode 210 may include a plurality of conductive patterns. In detail, the first electrode 210 may include a plurality of mesh lines crossing each other and a plurality of mesh openings formed by the mesh lines.

Accordingly, even if the first electrode 210 includes a metal, the first electrode 210 is not visually recognized from the outside, and visibility may be improved. In addition, since light transmittance is increased by the openings, luminance of the light path control member according to the exemplary embodiment may be improved.

The second substrate 120 may be disposed on the first substrate 110 . In detail, the second substrate 120 may be disposed on the first electrode 210 on the first substrate 110 .

The second substrate 120 may include the same or similar material as the first substrate 110 described above. For example, the second substrate 120 may include the same material as the first substrate 110 or a different material among the materials of the first substrate 110 described above.

Also, the second substrate 120 may have the same or similar thickness as the first substrate 110 described above. For example, the second substrate 120 may have a thickness of 25 μm to 150 μm.

In addition, the second substrate 120 may also extend in a first direction (1D), a second direction (2D), and a third direction (3D) like the first substrate 110 described above.

The second electrode 220 may be disposed on one surface of the second substrate 120 . In detail, the second electrode 220 may be disposed on the lower surface of the second substrate 120 . That is, the second electrode 220 may be disposed on a surface of the second substrate 120 on which the second substrate 120 and the first substrate 110 face each other. That is, the second electrode 220 may be disposed facing the first electrode 210 on the first substrate 110 . That is, the second electrode 220 may be disposed between the first electrode 210 and the second substrate 120 .

The second electrode 220 may include a material identical to or similar to that of the first electrode 210 described above. For example, the second electrode 220 may include the same material as the first electrode 210 or a different material among the materials of the first electrode 210 described above.

Also, the second electrode 220 may have the same or similar thickness as the first electrode 210 described above. For example, the second electrode 220 may have a thickness of about 10 nm to about 300 nm.

Also, the second electrode 220 may be formed to have the same or similar thickness as the first electrode 210 described above. In addition, the second electrode 220 may be formed in the same or similar shape as the first electrode 210 described above. For example, the second electrode 220 may be disposed as a surface electrode or a plurality of patterned electrodes.

The first substrate 110 and the second substrate 120 may have the same or different sizes.

In detail, the first length of the first substrate 110 extending in the first direction 1D has the same or similar size as the second length of the second substrate 120 extending in the first direction 1D. can

For example, the first length and the second length may have a size of 300 mm to 400 mm.

Also, the first width extending in the second direction 2D of the first substrate 110 may have the same or similar size as the second width extending in the second direction of the second substrate 120 .

For example, the first width and the second width may have a size of 150 mm to 200 mm.

Also, the first substrate 110 and the second substrate 120 may have different areas.

In detail, the first substrate 110 and the second substrate 120 may include protrusions. Referring to FIGS. 2 and 3 , the first substrate 110 may include a first protrusion PA1. Also, the second substrate 120 may include a second protrusion PA2. The first protrusion PA1 and the second protrusion PA2 may be displaced from each other.

That is, the first protrusion PA1 and the second protrusion PA2 do not overlap each other in the third direction 3D.

The embodiment is not limited thereto. The first protrusion PA1 and the second protrusion PA2 may include an overlapping area overlapping each other and a non-overlapping area not overlapping each other. That is, the first protrusion PA1 and the second protrusion PA2 may include an overlapping area overlapping each other in the third direction and a non-overlapping area not overlapping each other.

In this case, the first protrusion PA1 and the second protrusion PA2 may have different areas. Accordingly, the first substrate 110 and the second substrate 120 may have sizes different from each other by a size difference between the protrusions.

A connection area connected to an external (flexible) printed circuit board may be formed in each of the first protrusion PA1 and the second protrusion PA2.

In detail, a first connection area CA1 may be disposed on the first protrusion PA1. In addition, a second connection area CA2 may be disposed on the second protrusion PA2. When the first protrusion PA1 and the second protrusion PA2 are displaced from each other, the first connection area CA1 and the second connection area CA2 extend in the third direction 3D. do not overlap

A conductive material may be exposed on upper surfaces of the first connection area CA1 and the second connection area CA2, respectively. For example, the first electrode 210 may be exposed in the first connection area CA1. In addition, the conductive material 700 may be exposed in the second connection area CA2 . A cutting area for filling a conductive material may be formed in the second protrusion PA2 of the second substrate 120 . The conductive material may be filled in the cutting area. Accordingly, the second connection area CA2 may be formed.

The light path control member may be electrically connected to an external (flexible) printed circuit board through the first connection area CA1 and the second connection area CA2.

For example, a pad part may be disposed on the first connection area CA1 and the second connection area CA2. A conductive adhesive including an anisotropic conductive film (ACF) or an anisotropic conductive paste (ACP) may be disposed between the pad portion and the (flexible) printed circuit board. Accordingly, the light path control member may be electrically connected to an external (flexible) printed circuit board.

Alternatively, a conductive adhesive including an anisotropic conductive film (ACF) or an anisotropic conductive paste (ACP) is disposed between the first connection area CA1 and the second connection area CA2 and the (flexible) printed circuit board. . That is, the pad part may be omitted. Accordingly, the light path control member may be directly connected to an external (flexible) printed circuit board.

The light conversion unit 300 may be disposed between the first substrate 110 and the second substrate 120 . In detail, the light conversion unit 300 may be disposed between the first electrode 210 and the second electrode 220 .

An adhesive layer or a buffer layer may be disposed in a region between the light conversion unit 300 and the first substrate 110 or between the light conversion unit 300 and the second substrate 120 . The first substrate 110, the second substrate 120, and the light conversion unit 300 may be bonded by the adhesive layer and the buffer layer.

For example, an adhesive layer 410 may be disposed between the first electrode 210 and the light conversion unit 300 . As a result, the first substrate 110 and the light conversion unit 300 may be bonded.

The adhesive layer 410 may have a thickness within a set range. For example, the adhesive layer 410 may have a thickness of 10 μm to 30 μm.

In addition, a buffer layer 420 may be disposed between the second electrode 220 and the light conversion unit 300 . Accordingly, adhesion between the second electrode 220 and the light conversion unit 300 made of different materials may be improved.

The buffer layer 420 may have a thickness within a set range. For example, the buffer layer 420 may have a thickness of less than 1 μm.

The light conversion part 300 may include a plurality of barrier rib parts 310 and a receiving part 320 . A light conversion material 330 may be disposed in the accommodating part 320 . A light transmission characteristic of the light path control member may be changed by the light conversion material.

Referring to FIGS. 3 and 4 , the accommodating part 320 may be disposed extending in one direction. In detail, the accommodating part 320 may be tilted at a certain angle.

For example, the accommodating part 320 may extend in a direction different from the first direction 1D and the second direction 2D. That is, the accommodating part 320 may be tilted in the first direction (1D) and the second direction (2D). For example, the accommodating part 320 may extend in a direction between the first direction (1D) and the second direction (2D).

According to the orientation of the accommodating parts 320, the accommodating parts 320 may be sealed by the same or different sealing parts.

For example, all of the accommodating parts 320 may be sealed by the first sealing part 510 and the second sealing part 520 .

Alternatively, at least one of the accommodating parts 320 may be sealed by the first sealing part 510 and the fourth sealing part 540 . In addition, at least one other receiving part may be sealed by the first sealing part 510 and the second sealing part 520 . In addition, at least one other receiving part may be sealed by the second sealing part 520 and the third sealing part 530 .

The accommodating part 320 is tilted at an inclination angle within a set range with respect to the first direction (1D) and the second direction (2D). Accordingly, when the light path control member and the display panel are combined to form a display device, a moiré phenomenon caused by overlapping the accommodating portion and the pattern portion of the display panel may be prevented.

However, the embodiment is not limited thereto. That is, the accommodating part 320 is not tilted. That is, the accommodating part 320 may be disposed while extending in the first direction (1D) or the second direction (2D).

The first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may have the same or different thicknesses. The thickness of the first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 will be described in detail below.

5 and 6 are cross-sectional views taken along line AA' of FIG. 1 .

Referring to FIGS. 5 and 6 , the light conversion part 300 may include a barrier rib part 310 and an accommodating part 320 .

The barrier rib portion 310 may partition the receiving portion. That is, the barrier rib portion 310 may transmit light. That is, light emitted in the direction of the first substrate 110 or the second substrate 120 may pass through the barrier rib portion 310 .

The barrier rib portion 310 and the accommodating portion 320 may be disposed in different widths. For example, the width of the barrier rib portion 310 may be greater than that of the accommodating portion 320 .

In addition, the accommodating portion 320 may be formed in a shape that extends from the first electrode 210 toward the second electrode 220 and narrows in width.

The barrier rib portion 310 and the accommodating portion 320 may be alternately disposed. That is, each partition wall portion 310 may be disposed between the accommodating portions 320 adjacent to each other. In addition, each accommodating part 320 may be disposed between the partition walls 310 adjacent to each other.

The barrier rib portion 310 may include a transparent material. The barrier rib portion 310 may include a material capable of transmitting light.

The barrier rib portion 310 may include a resin material. For example, the barrier rib portion 310 may include a photocurable resin material. For example, the barrier rib portion 310 may include a UV resin or a transparent photoresist resin. Alternatively, the barrier rib portion 310 may include urethane resin or acrylic resin.

The accommodating part 320 may be formed to partially penetrate the light conversion part 300 . Accordingly, the accommodating part 320 may contact the adhesive layer 410 . In addition, the accommodating part 320 may be spaced apart from the buffer layer 420 . Accordingly, a base portion 350 may be formed between the accommodating portion 320 and the buffer layer 420 .

The light conversion material 330 may be disposed inside the accommodating part 320 . The light conversion material 330 may include light conversion particles 330a and a dispersion liquid 330b dispersing the light conversion particles 330a.

The dispersion 330b may include a transparent material. The dispersion 330b may include a non-polar solvent. In addition, the dispersion 330b may include a material capable of transmitting light. For example, the dispersion 330b may include at least one of halocarbon-based oil, paraffin-based oil, and isopropyl alcohol.

The light conversion particles 330a may be dispersed in the dispersion liquid 330b.

The light conversion particle 330a may include a material capable of absorbing light. That is, the light conversion particles 330a may be light absorbing particles, and the light conversion particles 330a may have a color. For example, the light conversion particle 330a may have a black-based color. For example, the light conversion particles 330a may include carbon black particles.

The surface of the light conversion particle 330a may be charged and may have a polarity. For example, the surface of the light conversion particle 330a may be negatively charged. Accordingly, when voltage is applied, the light conversion particle 330a may move toward the first electrode 210 or the second electrode 220 .

The light transmittance of the accommodating part 320 may be changed by the light conversion particles 330a. In detail, the accommodating part 320 may be changed into a light blocking part and a light transmitting part by the light conversion particles 330a. That is, the accommodating part 330a may change transmittance of light passing through the accommodating part 320 by dispersion and aggregation of the light conversion particles 330a.

For example, the light path member according to the embodiment may change from a first mode to a second mode by a voltage applied to the first electrode 210 and the second electrode 220 . Alternatively, the light path member according to the embodiment may be changed from the second mode to the first mode by voltages applied to the first electrode 210 and the second electrode 220 .

In the first mode, the accommodating part 320 may be a light blocking part. Thereby, the light of the set range angle can be blocked. Accordingly, the user's viewing angle may be narrowed. Accordingly, the light path control member may be driven in privacy mode.

Also, in the second mode, the accommodating part 320 may be a light transmitting part. Accordingly, light may be transmitted through both the barrier rib portion 310 and the accommodating portion 320 . Accordingly, the user's viewing angle may be widened. Accordingly, the light path control member can be driven in open mode.

The conversion from the first mode to the second mode may be realized by movement of the light conversion particle 330a. The light conversion particle 330a has charges on its surface. The light conversion particles 330a may move in the direction of the first electrode or the second electrode when a voltage is applied due to the characteristics of the surface charge.

For example, when no voltage is applied to the light path control member, the light conversion particles 330a are uniformly dispersed in the dispersion liquid 330b. Accordingly, light may be blocked from the accommodating part 320 by the light conversion particle 330a. Accordingly, in the first mode, the accommodating part 320 may be driven as a light blocking part.

Also, when a voltage is applied to the light path control member, the light conversion particles 330a may move. For example, the light conversion particle 330a may be moved toward one end or the other end of the accommodating part 320 by the voltage. That is, the light conversion particle 330a may move toward the first electrode 210 or the second electrode 220 .

For example, when a voltage is applied to the first electrode 210 and/or the second electrode 220, an electric field is formed between the first electrode 210 and the second electrode 220. Accordingly, the light conversion particles 330a whose surface is negatively charged may move toward the electrode having the anode among the first electrode 210 and the second electrode 220 using the dispersion liquid 330b as a medium.

Referring to FIG. 5 , when no voltage is applied to the first electrode 210 and/or the second electrode 220 , the light conversion particles 330a may be uniformly dispersed in the dispersion 330b. Accordingly, the accommodating part 320 may be driven as a light blocking part.

Referring to FIG. 6 , when a voltage is applied to the first electrode 210 and/or the second electrode 220, the light conversion particle 330a may move toward the second electrode 220, that is, , the light conversion particles 330a are moved in one direction. Accordingly, the accommodating part 320 may be driven as a light transmitting part.

Accordingly, the light path control member according to the embodiment may be driven in two modes according to the user's surrounding environment. That is, when the user desires to transmit light only at a specific viewing angle, the accommodating unit may be driven as a light blocking unit, or in an environment where the user requires a wide viewing angle and high luminance, a voltage may be applied to drive the accommodating unit as a light transmitting unit. there is.

Therefore, since the light path control member according to the embodiment can be implemented in two modes according to the user's request, the light path member can be applied regardless of the user's environment.

Referring to FIGS. 1, 5, 6, and 7 , the light path control member may include a sealing part. The sealing part may seal the light conversion material.

The sealing part may include a sealing part extending in the first direction (1D) and a sealing part extending in the second direction (2D). For example, the sealing part may include a first sealing part 510 and a second sealing part 520 extending in a first direction (1D). The first sealing part 510 and the second sealing part 520 may face each other in the second direction 2D.

In addition, the sealing part may include a third sealing part 530 and a fourth sealing part 540 extending in the second direction (2D). The third sealing part 530 and the fourth sealing part 540 may face each other in the first direction (1D).

The first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may be disposed in an edge area of the light path control member.

In addition, the first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may be connected to each other. In detail, the first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may be connected to each other except for the open area OA. . The open area OA is an area that conducts electricity between the second connection area CA2 and the second electrode 220 .

The first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 are formed by the cutting area of the light path control member 1000. can

For example, the light path control member 1000 may include a cutting area. The cutting area is at least one of the second substrate 120, the second electrode 220, the buffer layer 420, the light conversion unit 300, the adhesive layer 410, the first electrode 210, and the first substrate 110. It can be formed by removing. The first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may be disposed inside the cutting area.

In detail, the light conversion material 330 may be injected into the receiving part 320 through the cutting area. Subsequently, a sealing material may be disposed inside the cutting area. Accordingly, the light conversion material 300 may be sealed. For example, a cutting area where the first sealing part 510 is disposed may be an injection part for injecting a light conversion material. Also, the cutting area where the second sealing part 520 is disposed may be a suction part for sucking the light conversion material.

The first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may contact both ends of the receiving part 320. . That is, according to the direction of the accommodating part, the first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 are the accommodating part 320 It can be placed in contact with both ends of

At this time, the number of accommodating units contacted by the first sealing part 510 and the second sealing part 520 is greater than the number of accommodating units contacted by the third sealing part 530 and the fourth sealing part 540. can be big The first sealing part 510 and the second sealing part 520 are passages through which the light conversion material is injected. Accordingly, the first sealing part 510 and the second sealing part 520 may contact all of the receiving parts. On the other hand, the third sealing part 530 and the fourth sealing part 540 may contact some of the receiving parts among all the receiving parts.

Accordingly, the first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 are configured so that the light conversion material 330 is the accommodating part. (320) It can prevent leakage to the outside.

Alternatively, only the first sealing part 510 and the second sealing part 520 may be disposed in contact with both ends of the receiving part 320 according to the direction of the receiving part.

Accordingly, the first sealing part 510 and the second sealing part 520 can prevent the light conversion material 330 from leaking out of the accommodating part 320 . In addition, the third sealing part 530 and the fourth sealing part 540 can prevent moisture from entering from the side of the light path control member.

The first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 may have different thicknesses. In detail, the thickness of at least one of the first sealing part 510 and the second sealing part 520 may be different from the thickness of the third sealing part 530 and the fourth sealing part 540. . For example, the thickness of the first sealing part 510 and the second sealing part 520 may be different from the thickness of the third sealing part 530 and the fourth sealing part 540 .

Referring to FIG. 7 , the first sealing part 510 and the second sealing part 520 may be disposed inside the cutting area. The cutting area may be formed through part or all of the second substrate 120 , the second electrode 220 , the buffer layer 420 , and the light conversion part 300 .

Accordingly, the first sealing part 510 and the second sealing part 520 are the second substrate 120, the second electrode 220, the buffer layer 420 and the light conversion part 300. It can be placed in contact with the side of the

Also, referring to FIGS. 5 and 6 , the third sealing part 530 and the fourth sealing part 540 may be disposed inside the cutting area. The cutting area includes the second substrate 120, the second electrode 220, the buffer layer 420, the light conversion part 300, the adhesive layer 410, the first electrode 210, and the first electrode 210. 1 may be formed through the substrate 110 .

Accordingly, the third sealing part 530 and the fourth sealing part 540 form the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion part 300. , The adhesive layer 410, the first electrode 210, and the side surface of the first substrate 110 may be contacted and disposed.

That is, the third sealing part 530 and the fourth sealing part 540 may be disposed in a cutting area penetrating the upper and lower surfaces of the light path control member.

Accordingly, the thickness T2 of the third sealing part 530 and the fourth sealing part 540 is greater than the thickness T1 of the first sealing part 510 and the second sealing part 520. can Here, the thicknesses T1 and T2 may be defined as thicknesses in the third direction 3D.

Accordingly, adhesion between the third sealing part 530 and the fourth sealing part 540 may be improved. The adhesive force between the sealing material forming the third sealing part 530 and the fourth sealing part 540 and the material forming the electrode and the substrate is the relationship between the material forming the light conversion part and the material forming the electrode and the substrate. may be greater than the adhesive force. The third sealing part 530 and the fourth sealing part 540 may also contact the first substrate 110 and the first electrode 210 . Accordingly, adhesion between the third sealing part 530 and the fourth sealing part 540 disposed inside the cutting area may be improved.

Accordingly, it is possible to prevent film separation of the third sealing part 530 and the fourth sealing part 540 . Accordingly, the reliability of the optical path control member can be improved.

In addition, when the third sealing part 530 and the fourth sealing part 540 are filled in the cutting area, air bubbles of the sealing material may be released to the outside. That is, since the cutting area passes through the light path control member, air bubbles generated when the sealing material is filled may be emitted to the outside.

Accordingly, after the third sealing part 530 and the fourth sealing part 540 are cured, the formation of voids due to internal air bubbles is reduced. Accordingly, sealing characteristics of the third sealing portion 530 and the fourth sealing portion 540 may be improved.

In addition, the third sealing part 530 and the fourth sealing part 540 may seal the entire side surface of the light path control member. Accordingly, it is possible to easily prevent penetration of moisture that can be transferred through the first substrate, the first electrode, and the adhesive layer.

The third sealing part 530 and the fourth sealing part 540 may have different widths between lower and upper surfaces. Here, the lower surfaces of the third sealing part 530 and the fourth sealing part 540 are defined by the width of the cutting area exposed from the first substrate 110 . Also, the top surface is defined as the width of the cutting area exposed from the second substrate 120 .

The third sealing part 530 and the fourth sealing part 540 may have a narrow width while extending from the second substrate 120 toward the first substrate 110 . That is, the third sealing part 530 and the fourth sealing part 540 may have a narrow width while extending from the upper surface toward the lower surface. Accordingly, the third sealing part 530 and the fourth sealing part 540 may have a maximum width on the upper surface and a minimum width on the lower surface.

Accordingly, the width w1 of the lower surface may be smaller than that of the upper surface w2. In detail, the width w1 of the lower surface may be 10% or less, 5% or less, 3% or less, or 1% or less of the width w2 of the upper surface.

When the width w1 of the lower surface exceeds 10% of the width of the upper surface w2, uncured sealing material may flow to the lower surface. Accordingly, a sealing material may remain on the first substrate 110 . Therefore, it may be recognized as a stain to the user.

Referring to FIG. 8 , the third sealing part 530 and the fourth sealing part 540 may be exposed on the outermost surface of the light path control member.

A cutting area where the third sealing part 530 and the fourth sealing part 540 are disposed passes through the optical path control member. Accordingly, the first substrate 110, the second substrate 120, the first electrode 210, and the second electrode disposed on the outer surfaces of the third sealing portion 530 and the fourth sealing portion 540 220, the adhesive layer 410, and the buffer layer 420 can be cut manually without using a separate cutting equipment.

Accordingly, the third sealing part 530 and the fourth sealing part 540 may be directly exposed to the outermost surface of the light path control member.

Accordingly, the size of the left and right bezel areas of the light path control member is reduced. Accordingly, the size of the light path control member can be reduced.

Meanwhile, the first sealing part 510 and the second sealing part 520 may also be disposed in a cutting area penetrating the light path control member.

Referring to FIG. 9 , the first sealing part 510 and the second sealing part 520 may be disposed inside the cutting area. The cutting area includes the second substrate 120, the second electrode 220, the buffer layer 420, the light conversion part 300, the adhesive layer 410, the first electrode 210, and the first electrode 210. 1 may be formed through the substrate 110 .

Accordingly, the first sealing part 510 and the second sealing part 520 are the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion part 300. , The adhesive layer 410, the first electrode 210, and the side surface of the first substrate 110 may be contacted and disposed.

That is, the first sealing part 510 and the second sealing part 520 may also be disposed in the cutting area penetrating the upper and lower surfaces of the light path control member.

Accordingly, the first sealing part 510, the second sealing part 520, the third sealing part 530, and the fourth sealing part 540 all seal the entire side surface of the light path control member. can Accordingly, penetration of external moisture through the outer surface of the light path control member can be prevented.

below. Referring to FIGS. 10 to 14 , a display device and a display device to which the light path control member according to the exemplary embodiment is applied will be described.

Referring to FIGS. 10 and 11 , the light path control member 1000 according to the exemplary embodiment may be disposed on or below the display panel 2000 .

The display panel 2000 and the light path control member 1000 may be disposed while being adhered to each other. For example, the display panel 2000 and the light path control member 1000 may be adhered to each other through an adhesive member 1500 . The adhesive member 1500 may be transparent. For example, the adhesive member 1500 may include an adhesive or an adhesive layer including an optically transparent adhesive material.

The adhesive member 1500 may include a release film. In detail, the release film may be removed when the light path member and the display panel are bonded. Accordingly, the light path control member and the display panel may be bonded.

The display panel 2000 may include a first base substrate 2100 and a second base substrate 2200 . When the display panel 2000 is a liquid crystal display panel, the light path control member may be formed below the liquid crystal panel. That is, when a surface viewed by a user on the liquid crystal panel is defined as an upper portion of the liquid crystal panel, the light path control member may be disposed below the liquid crystal panel. In the display panel 2000, a first base substrate 2100 including a thin film transistor (TFT) and a pixel electrode and a second base substrate 2200 including color filter layers are bonded with a liquid crystal layer interposed therebetween. structure can be formed.

In addition, in the display panel 2000, a thin film transistor, a color filter, and a black electrolyte are formed on a first base substrate 2100, and a second base substrate 2200 has a liquid crystal layer interposed therebetween. ) and COT (color filter on transistor) structure may be a liquid crystal display panel. That is, a thin film transistor may be formed on the first base substrate 2100, a protective film may be formed on the thin film transistor, and a color filter layer may be formed on the protective film. In addition, a pixel electrode contacting the thin film transistor is formed on the first base substrate 2100 . At this time, in order to improve the aperture ratio and simplify the mask process, the black electrolyte may be omitted and the common electrode may be formed to serve as the black electrolyte.

In addition, when the display panel 2000 is a liquid crystal display panel, the display device may further include a backlight unit 3000 providing light from a rear surface of the display panel 2000 .

That is, as shown in FIG. 10 , the light path control member is disposed below the liquid crystal panel and above the backlight unit 3000, and the light path control member is disposed between the backlight unit 3000 and the display panel 2000. can be placed in

Alternatively, as shown in FIG. 11 , when the display panel 2000 is an organic light emitting diode panel, the light path control member may be formed above the organic light emitting diode panel. That is, when a surface viewed by a user on an organic light emitting diode panel is defined as an upper portion of the organic light emitting diode panel, the light path control member may be disposed above the organic light emitting diode panel. The display panel 2000 may include a self-light emitting device that does not require a separate light source. In the display panel 2000 , a thin film transistor may be formed on a first base substrate 2100 , and an organic light emitting element contacting the thin film transistor may be formed. The organic light emitting diode may include an anode, a cathode, and an organic light emitting layer formed between the anode and the cathode. In addition, a second base substrate 2200 serving as an encapsulation substrate for encapsulation may be further included on the organic light emitting device.

Also, although not shown in the drawings, a polarizer may be further disposed between the light path control member 1000 and the display panel 2000 . The polarizer may be a linear polarizer or an antireflection polarizer. For example, when the display panel 2000 is a liquid crystal display panel, the polarizer may be a linear polarizer. Also, when the display panel 2000 is an organic light emitting diode panel, the polarizing plate may be an antireflection polarizing plate.

In addition, an additional functional layer 1300 such as an antireflection layer or an antiglare may be further disposed on the light path control member 1000 . In detail, the functional layer 1300 may be bonded to one surface of the first substrate 110 of the light path control member. Although not shown in the drawing, the functional layer 1300 may be adhered to the first substrate 110 of the light path control member through an adhesive layer. In addition, a release film for protecting the functional layer may be further disposed on the functional layer 1300 .

In addition, a touch panel may be further disposed between the display panel and the light path control member.

Although the light path control member is illustrated as being disposed on the upper part of the display panel, the embodiment is not limited thereto, and the light control member is located at a position where light can be adjusted, that is, the lower part of the display panel or the display panel. It may be disposed in various positions, such as between the second substrate and the first substrate.

In addition, although the light conversion unit of the light path control member according to the embodiment is shown in a direction parallel or perpendicular to the outer surface of the second substrate in the drawing, the light conversion unit may be formed to be inclined at a predetermined angle with the outer surface of the second substrate. may be Accordingly, a moire phenomenon occurring between the display panel and the light path control member may be reduced.

Referring to FIGS. 12 to 14 , the light path control member according to the exemplary embodiment may be applied to various display devices.

Referring to FIGS. 12 to 14 , the light path control member according to the embodiment may be applied to a display device displaying a display.

For example, when power is applied to the light path control member as shown in FIG. 12, the accommodating part functions as a light transmitting part so that the display device can be driven in open mode, and power is applied to the light path control member as shown in FIG. 13. When not applied, the accommodating portion functions as a light blocking portion, and the display device may be driven in a light blocking mode.

Accordingly, the user can easily drive the display device in a privacy mode or a normal mode according to the application of power.

Light emitted from the backlight unit or the self-light emitting element may move in a direction from the first substrate to the second substrate. Alternatively, light emitted from the backlight unit or the self-light emitting device may also move in a direction from the second substrate to the first substrate.

Also, referring to FIG. 14 , the display device to which the light path control member according to the embodiment is applied may also be applied to the interior of a vehicle.

For example, the display device including the light path control member according to the embodiment may display information about the vehicle and an image for checking the movement path of the vehicle. The display device may be disposed between a driver's seat and a front passenger's seat of a vehicle.

In addition, the light path control member according to the embodiment may be applied to an instrument panel displaying vehicle speed, engine, and warning signals.

In addition, the light path control member according to the embodiment may be applied to the front glass (FG) or left and right window glass of the vehicle.

The features, structures, effects, etc. described in the foregoing embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are merely examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention belongs can exemplify the above to the extent that does not deviate from the essential characteristics of the present embodiment. It will be seen that various variations and applications that have not been made are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences related to these variations and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims

a first substrate;

a first electrode disposed on the first substrate;

a second substrate disposed on the first substrate;

a second electrode disposed under the second substrate;

a light conversion unit including a plurality of accommodating units disposed between the first electrode and the second electrode and accommodating a light conversion material; and

A sealing portion sealing the light conversion material;

The sealing part,

a first sealing part and a second sealing part formed in a cutting area formed by cutting the second substrate, the second electrode, and the light conversion part and extending in a first direction; and

A third sealing part and a fourth sealing part formed in a cutting area formed by cutting the second substrate, the second electrode, and the light conversion part, and extending in a second direction different from the first direction, and a fourth sealing part,

The light path control member of claim 1 , wherein a thickness of at least one of the third sealing portion and the fourth sealing portion is different from a thickness of the first sealing portion and the second sealing portion.
According to claim 1,

The light path control member of claim 1 , wherein a thickness of at least one of the third sealing portion and the fourth sealing portion is greater than that of the first sealing portion and the second sealing portion.
According to claim 1,

The first sealing part, the second sealing part, the third sealing part, and the fourth sealing part include at least one of the first substrate, the first electrode, the light conversion part, the second substrate, and the second electrode. An optical path control member disposed inside the cutting area formed while penetrating the .
According to claim 1,

The third sealing part and the fourth sealing part have a narrow width extending from the second substrate toward the first substrate,

The light path control member of claim 1 , wherein a minimum width of at least one of the third sealing part and the fourth sealing part is 5% or less of the maximum width.
According to claim 1,

The light path control member of claim 1 , wherein the number of accommodating units contacting the first sealing unit and the second sealing unit is greater than the number of accommodating units contacting the third sealing unit and the fourth sealing unit.
According to claim 1,

At least one sealing portion of the third sealing portion and the fourth sealing portion is exposed and disposed on the outermost surface of the light path controlling member;
a first substrate;

a first electrode disposed on the first substrate;

a second substrate disposed on the first substrate;

a second electrode disposed under the second substrate;

a light conversion unit including a plurality of accommodating units disposed between the first electrode and the second electrode and accommodating a light conversion material; and

A sealing portion sealing the light conversion material;

The sealing part,

a first sealing part and a second sealing part formed in a cutting area formed by cutting the second substrate, the second electrode, and the light conversion part and extending in a first direction; and

A third sealing part and a fourth sealing part formed in a cutting area formed by cutting the second substrate, the second electrode, and the light conversion part, and extending in a second direction different from the first direction, and a fourth sealing part,

At least one sealing part of the third sealing part and the fourth sealing part penetrates the first substrate, the first electrode, the light conversion part, the second substrate, and the second electrode, and is formed inside a cutting area. An optical path control member disposed on the .
According to claim 7,

The third sealing part and the fourth sealing part have a narrow width extending from the second substrate toward the first substrate,

The light path control member of claim 1 , wherein a minimum width of at least one of the third sealing part and the fourth sealing part is 5% or less of the maximum width.
According to claim 7,

At least one sealing part of the first sealing part and the second sealing part penetrates the first substrate, the first electrode, the light conversion part, the second substrate, and the second electrode, and is formed inside a cutting area. An optical path control member disposed on the .
According to claim 7,

The light path control member of claim 1 , wherein the number of accommodating units contacting the first sealing unit and the second sealing unit is greater than the number of accommodating units contacting the third sealing unit and the fourth sealing unit.